// 📦 引入工具库
const _ = require("lodash");
const path = require("path");
const fs = require("fs");

// 📦 ESM 支持模块加载
const esm = require("esm");
const requireModule = esm(module);

// 📦 项目依赖模块
const { readAllValues } = requireModule(
  "../../../awakened-potential/helpers/readAllValues.js"
);
const checkAccuracy = requireModule("../../utils/checkAccuracy.js");

// ✅ 读取历史开奖数据（模拟全部）
const allValues = readAllValues("m");

// ✅ 号码池（01 ~ 49）
const allNumbers = Array.from({ length: 49 }, (_, i) =>
  (i + 1).toString().padStart(2, "0")
);

// ✅ 是否使用窗口
const useWindow = true;
// ✅ 窗口大小
const windowSize = 4;

// ✅ 存储预测结果
const predictResults = [];
let correct = 0;
let maxWrongStreak = 0;
let currentWrongStreak = 0;

/**
 * 判断一个号码是否是奇数
 */
const isOdd = (numStr) => parseInt(numStr, 10) % 2 === 1;

/**
 * 从当前窗口中统计奇偶比例
 */
const analyzeOddEvenRatio = (temp) => {
  let oddCount = 0;
  let evenCount = 0;

  temp.forEach((item) => {
    const num = item.number;
    if (isOdd(num)) {
      oddCount++;
    } else {
      evenCount++;
    }
  });

  const total = oddCount + evenCount;
  return {
    oddRatio: oddCount / total,
    evenRatio: evenCount / total,
  };
};

/**
 * 确定性方式选择 32 个号码（根据奇偶比例 + 补全）
 */
const select32NumbersByOddEven = (oddRatio) => {
  const odds = allNumbers.filter((n) => isOdd(n)).sort();
  const evens = allNumbers.filter((n) => !isOdd(n)).sort();

  // 目标奇偶数量
  let targetOddCount = Math.round(oddRatio * 32);
  let targetEvenCount = 32 - targetOddCount;

  // 修正上限
  targetOddCount = Math.min(targetOddCount, odds.length);
  targetEvenCount = Math.min(targetEvenCount, evens.length);

  let selected = odds.slice(0, targetOddCount).concat(
    evens.slice(0, targetEvenCount)
  );

  // 补全剩余号码（固定顺序）
  const already = new Set(selected);
  const remaining = allNumbers.filter((n) => !already.has(n));
  for (const n of remaining) {
    if (selected.length >= 32) break;
    selected.push(n);
  }

  if (selected.length !== 32) {
    throw new Error(`❗ 无法生成 32 个不重复号码（目前只有 ${selected.length} 个）`);
  }

  return selected;
};

// ✅ 主循环
allValues.forEach((item, index) => {
  const temp = useWindow
    ? allValues.slice(Math.max(0, index - windowSize), index)
    : allValues.slice(0, index);

  if (temp.length === 0) return;

  const { oddRatio } = analyzeOddEvenRatio(temp);
  const selectedNumbers = select32NumbersByOddEven(oddRatio);

  if (selectedNumbers.length !== 32) {
    throw new Error("选出的32个号码数量不正确");
  }

  try {
    const isHit = checkAccuracy(selectedNumbers, item.number);
    if (isHit) {
      correct += 1;
      currentWrongStreak = 0;
    } else {
      currentWrongStreak += 1;
      maxWrongStreak = Math.max(maxWrongStreak, currentWrongStreak);
    }
    predictResults.push(selectedNumbers);
  } catch (err) {
    console.error(`❌ checkAccuracy error at index ${index}: ${err.message}`);
  }
});

// ✅ 输出统计结果
const total = predictResults.length;
const accuracy = total > 0 ? ((correct / total) * 100).toFixed(2) : 0;

console.log(`预测总数: ${total}`);
console.log(`命中次数: ${correct}`);
console.log(`准确率: ${accuracy}%`);
console.log(`最大连续错误次数: ${maxWrongStreak}`);
